摘要:
随着城市化发展,重金属污染物会通过汽油燃烧、轮胎的磨损、油脂的渗漏等过程产生,其通常吸附于颗粒物表面或以化学态、离子态的形式附着于地面。经过雨水的冲刷作用,重金属污染物溶于雨水径流排入受纳水体,造成受纳水体污染,影响生态环境。通过综合性地讨论我国几个城市的道路雨水径流中重金属污染现状,对比不同城市和同一城市不同功能性用地的重金属污染状况,就交通因素、大气污染程度、下垫面因素和季节性变化等对雨水径流重金属污染的影响进行了相关性分析,为我国开展重金属污染防治工作提供相关依据。
Abstract:
With the development of urbanization, heavy metal pollutants are generated through gasoline combustion, tire wear and oil leakage. They are usually adsorbed on particulates or adhered to the ground in the manner of compound form and ionic state. After the scour of rainwater, heavy metal pollutants are dissolved in the rainwater runoffs going into the receiving water, resulting in polluting the receiving water and affecting the ecological environment. By comprehensive discussion of the current situation of heavy metal pollution in road runoffs of several cities in China, and comparison of heavy metal pollution in different functional land conditions in different cities and in the same city, a correlation analysis of heavy metal pollution of rainwater runoffs is carried out from the aspects of several factors such as traffic factors, the degree of air pollution, surface factors, and seasonal changes, providing relevant basis for implementation of heavy metal pollution control in China.
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